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https://www.readbyqxmd.com/read/29154992/structural-and-biophysical-characterization-of-rv3716c-a-hypothetical-protein-from-mycobacterium-tuberculosis
#1
A Gopalan, G Deka, M Prabhavathi, H S Savithri, M R N Murthy, A Raja
Latent tuberculosis (TB) is the main hurdle in reaching the goal of "Stop TB 2050". Tuberculin skin and Interferon-gamma release assay tests used currently for the diagnosis of TB infection cannot distinguish between active disease and latent tuberculosis infection (LTBI) and hence new and sensitive protein markers need to be identified for the diagnosis. A protein Rv3716c from Mycobacterium tuberculosis (MtbRv3716c) has been identified as a potential surrogate marker for the diagnosis of LTBI. Here, we present characterization of MtbRv3716c (∼13 kDa) using both biophysical and X-Ray crystallographic methods...
November 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29148853/multi-stage-subunit-vaccines-against-mycobacterium-tuberculosis-an-alternative-to-the-bcg-vaccine-or-a-bcg-prime-boost
#2
Farzad Khademi, Mohammad Derakhshan, Arshid Yousefi-Avarvand, Mohsen Tafaghodi, Saman Soleimanpour
More than two billion people are latently infected with Mycobacterium tuberculosis. Most tuberculosis (TB)-subunit vaccines currently in various stages of clinical trials are designed for prevention of active TB, but not to prevent reactivation of latent TB-infection. Thus, there is an urgent need for an effective multi-stage vaccine based on early-expressed and latently-expressed antigens that prevents both acute and latent infections. Areas covered: Here, we reviewed the published pre-clinical and clinical studies of multi-stage subunit vaccines against TB, and the protective capacities of the vaccines were compared with BCG, either alone or in combination with different vaccine delivery systems/adjuvants...
November 17, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/29145443/lessons-learned-from-continued-tb-outbreaks-in-a-high-school
#3
Young Kim, Byeong Ki Kim, Hong Jo Choi, Sung Weon Ryu, Eui Sook Kim, Yoon Soo Chang, Hee Jin Kim, Jae Hyung Cha, Je Hyeong Kim, Chol Shin, Seung Heon Lee
We investigated the aftereffects of confirmatory QuantiFERON testing (QFT) added to a positive tuberculin skin test (TST). We reviewed the pre and post course of sequential tuberculosis (TB) outbreaks in a high school where massive 43 active TB cases had been found within one year before delayed contact investigation. And we investigated the TB development in relation to initial TST and QFT during mean follow-up of 3.9 ± 0.9 years. After delayed contact investigation for two subsequent TB outbreaks, 925 contacts were divided into the following 3 groups: TST- (n = 632), TST+/QFT+ (n = 24), TST+/QFT- (n = 258)...
2017: PloS One
https://www.readbyqxmd.com/read/29142046/quantitative-analysis-of-interferon-%C3%AE-release-assay-response-in-children-with-latent-and-active-tuberculosis
#4
Giulia Lombardi, Roberta Petrucci, Ilaria Corsini, Maria Letizia Bacchi Reggiani, Francesca Visciotti, Filippo Bernardi, Maria Paola Landini, Salvatore Cazzato, Paola Dal Monte
The use of interferon-γ (IFN-γ) release assays (IGRAs) for the diagnosis of tuberculosis (TB) infection in children is still under debate because of concerns about their immature immune response.The aim of this study was to investigate quantitative values of QuantiFERON®-TB Gold In-Tube (QFT-IT), a commercially available IGRA, in a large cohort of children screened for TB infection.A retrospective analysis was conducted on samples from 517 children aged 0-14 years old at the Pediatric Unit of S. Orsola-Malpighi University Hospital of Bologna (Italy); quantitative responses to QFT-IT stimuli were analyzed according to diagnosis and age...
November 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29140946/comparison-of-the-quantiferon-tb-gold-in-tube-assay-with-tuberculin-skin-test-for-the-diagnosis-of-latent-tuberculosis-infection-among-hiv-infected-and-uninfected-children
#5
Walter Dehority, Rolando M Viani, Maria Rosario G Araneta, Graciano Lopez, Stephen A Spector
BACKGROUND: Diagnosis of latent tuberculosis infection (LTBI) is facilitated by tuberculin skin testing (TST) or interferon-gamma release assays such as the QuantiFERON TB Gold In-Tube (QTF-GIT) assays. Limited data exist on the utility of interferon-gamma release assays in HIV-infected children, which may be falsely negative due to immunosuppression. METHODS: A cross-sectional study comparing TST to QTF-GIT for the diagnosis of suspected LTBI was performed in children in Tijuana, Mexico, and in San Diego, California...
December 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29137869/morbidity-and-mortality-in-homeless-individuals-prisoners-sex-workers-and-individuals-with-substance-use-disorders-in-high-income-countries-a-systematic-review-and-meta-analysis
#6
Robert W Aldridge, Alistair Story, Stephen W Hwang, Merete Nordentoft, Serena A Luchenski, Greg Hartwell, Emily J Tweed, Dan Lewer, Srinivasa Vittal Katikireddi, Andrew C Hayward
BACKGROUND: Inclusion health focuses on people in extremely poor health due to poverty, marginalisation, and multimorbidity. We aimed to review morbidity and mortality data on four overlapping populations who experience considerable social exclusion: homeless populations, individuals with substance use disorders, sex workers, and imprisoned individuals. METHODS: For this systematic review and meta-analysis, we searched MEDLINE, Embase, and the Cochrane Library for studies published between Jan 1, 2005, and Oct 1, 2015...
November 10, 2017: Lancet
https://www.readbyqxmd.com/read/29136358/is-secretion-of-ifn-gamma-in-response-to-mycobacterium-tuberculosis-antigens-in-youngest-children-sufficient-to-play-a-role-in-tb-diagnostics
#7
Teresa Bielecka, Anna Komorowska-Piotrowska, Katarzyna Krenke, Wojciech Feleszko, Marek Kulus
OBJECTIVES: To assess whether children ≤5 years of age, produce sufficient amounts of interferon gamma (IFN-ɣ) in response to phytohaemagglutinin (mitogen), and Mycobacterium tuberculosis antigens (TB antigens) in the QuantiFERON-TB Gold in-Tube test (QFT-GIT), (Cellestis Ltd., Australia). WORKING HYPOTHESIS: Is TB-antigen-induced IFN-ɣ response in children ≤5 years sufficient to consider QFT-GIT a possible tool for TB diagnostics? Study design, patient-subject selection, and methods: We recruited children 0-17 years old suspected of TB infection to this cross-sectional study, in whom QFT-GIT and TST were performed...
November 14, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29135150/-chronic-course-of-latent-urogenital-tuberculosis
#8
A V Lysov, V A Okhlopkov, A V Mordyk, L V Puzyreva, E M Shestak, I G Martynov
This is a case report of an elderly patient with urogenital tuberculosis and concurrent tuberculosis of peripheral inguinal lymph nodes. The disease manifested by a fistulous form of inguinal lymphadenitis for 10 years and spread to the kidneys and genitals, but the patient did not seek medical attention. Changes on the glans penis prompted him to consult dermatovenereologist. Due to ineffective treatment and uncovering the scar in the inguinal area the patient was send to an anti-tuberculosis institution, where he was diagnosed with tuberculosis involving the kidneys, prostate, epididymis, penis, inguinal lymph nodes...
October 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/29129474/-screening-program-for-tuberculosis-among-international-exchange-students-in-the-department-of-is%C3%A3-re
#9
M-V Albahary, F Blanc-Jouvan, C Recule, C Dubey, P Pavese
INTRODUCTION: France is a low-incidence country for tuberculosis (TB). Consequently screening is focused on high-risk populations, in particular migrants. The aim of this study was to evaluate the epidemiology of TB among international exchange students in the Department of Isère and the screening programs used. METHODS: We carried out an organizational audit based on interviews with physicians involved in the management of TB in Isère. We conducted a retrospective descriptive study based on a case series of foreign students treated for TB from 2003 to 2013 inclusively...
November 9, 2017: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/29126342/-tuberculosis-among-refugees-and-asylum-seekers-tuberculosis-screening-on-arrival-and-case-management
#10
Martin Priwitzer
The statement of the Federal Association of Physicians of Public Health Services provides recommendations concerning tuberculosis screening of refugees and asylum seekers on arrival specific to different groups of persons (adults, children, pregnant women, unaccompanied minors), taking into account the legal background and the current recommendations of the Robert Koch Institute as well as of the German Society for Pediatric Infectiology. In addition, recommendations are given to ensure treatment success in refugees and asylum seekers with tuberculosis, to carry out contact investigations and for preventive treatment of latent tuberculosis infection among refugees and asylum seekers...
November 10, 2017: Das Gesundheitswesen
https://www.readbyqxmd.com/read/29126100/using-reports-of-latent-tuberculosis-infection-among-young-children-to-identify-tuberculosis-transmission-in-new-york-city-2006-2012
#11
Jennifer Sanderson Slutsker, Lisa Trieu, Aldo Crossa, Shama Desai Ahuja
Young children with latent tuberculosis infection (LTBI) indicate recent TB transmission. We reviewed surveillance reports of children with LTBI to assess whether more follow-up is needed to prevent TB among this high-risk population. All children <5 years reported to the New York City Department of Health from 2006-2012 were abstracted from the TB Registry to identify those with LTBI. Potential source cases were identified; defined as any infectious TB case diagnosed in the 2 years before a child was reported and whose residence was within <0...
November 8, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29124751/detailed-characterization-of-human-mycobacterium-tuberculosis-specific-hla-e-restricted-cd8-t-cells
#12
Teresa Prezzemolo, Krista E van Meijgaarden, Kees Lmc Franken, Nadia Caccamo, Francesco Dieli, Tom Hm Ottenhoff, Simone A Joosten
HLA-E presented antigens are interesting targets for vaccination given HLA-Es' essentially monomorphic nature. We have shown previously that Mycobacterium tuberculosis (Mtb) peptides are presented by HLA-E to CD8(+) effector T-cells, but the precise phenotype and functional capacity of these cells remains poorly characterized. We have developed and utilized in this study a new protocol combining HLA-E tetramer with intracellular staining for cytokines, transcription factors and cytotoxic molecules to characterize these cells in depth...
November 9, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/29114781/self-administered-versus-directly-observed-once-weekly-isoniazid-and-rifapentine-treatment-of-latent-tuberculosis-infection-a-randomized-trial
#13
Robert Belknap, David Holland, Pei-Jean Feng, Joan-Pau Millet, Joan A Caylà, Neil A Martinson, Alicia Wright, Michael P Chen, Ruth N Moro, Nigel A Scott, Bert Arevalo, José M Miró, Margarita E Villarino, Marc Weiner, Andrey S Borisov
Background: Expanding latent tuberculosis treatment is important to decrease active disease globally. Once-weekly isoniazid and rifapentine for 12 doses is effective but limited by requiring direct observation. Objective: To compare treatment completion and safety of once-weekly isoniazid and rifapentine by self-administration versus direct observation. Design: An open-label, phase 4 randomized clinical trial designed as a noninferiority study with a 15% margin...
November 7, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/29114744/tailoring-treatment-of-latent-tuberculosis-to-the-needs-of-patients-and-families
#14
Haileyesus Getahun, Alberto Matteelli
No abstract text is available yet for this article.
November 7, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/29112743/designing-and-evaluating-interventions-to-halt-the-transmission-of-tuberculosis
#15
REVIEW
David W Dowdy, Alison D Grant, Keertan Dheda, Edward Nardell, Katherine Fielding, David A J Moore
To reduce the incidence of tuberculosis, it is insufficient to simply understand the dynamics of tuberculosis transmission. Rather, we must design and rigorously evaluate interventions to halt transmission, prioritizing those interventions most likely to achieve population-level impact. Synergy in reducing tuberculosis transmission may be attainable by combining interventions that shrink the reservoir of latent Mycobacterium tuberculosis infection (preventive therapy), shorten the time between disease onset and treatment initiation (case finding and diagnosis), and prevent transmission in key settings, such as the built environment (infection control)...
November 3, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29111156/genetics-of-human-susceptibility-to-active-and-latent-tuberculosis-present-knowledge-and-future-perspectives
#16
REVIEW
Laurent Abel, Jacques Fellay, David W Haas, Erwin Schurr, Geetha Srikrishna, Michael Urbanowski, Nimisha Chaturvedi, Sudha Srinivasan, Daniel H Johnson, William R Bishai
Tuberculosis is an ancient human disease, estimated to have originated and evolved over thousands of years alongside modern human populations. Despite considerable advances in disease control, tuberculosis remains one of the world's deadliest communicable diseases with 10 million incident cases and 1·8 million deaths in 2015 alone based on the annual WHO report, due to inadequate health service resources in less-developed regions of the world, and exacerbated by the HIV/AIDS pandemic and emergence of multidrug-resistant strains of Mycobacterium tuberculosis...
October 27, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29109018/effect-of-mycobacterium-tuberculosis-infection-on-adipocyte-physiology
#17
Janeesh Plakkal Ayyappan, Christopher Vinnard, Selvakumar Subbian, Jyothi F Nagajyothi
Tuberculosis (TB) remains as a major threat to human health worldwide despite of the availability of standardized antibiotic therapy. One of the characteristic of pathogenic Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis is its ability to persist in the host in a dormant state and develop latent infection without clinical signs of active disease. However, the mechanisms involved in bacterial persistence and the establishment of latency is not well understood. Adipose tissue is emerging as an important niche that favors actively replicating as well as dormant Mtb during acute and latent infection...
November 8, 2017: Microbes and Infection
https://www.readbyqxmd.com/read/29106984/evaluation-of-profile-and-functionality-of-memory-t-cells-in-pulmonary-tuberculosis
#18
Marcela M Tonaco, Jôsimar D Moreira, Fernanda F C Nunes, Cristina M G Loures, Larissa R Souza, Janaina M Martins, Henrique R Silva, Arthur Henrique R Porto, Vicente Paulo C P Toledo, Silvana S Miranda, Tânia Mara P D Guimarães
The cells T CD4+ T and CD8+ can be subdivided into phenotypes naïve, T of central memory, T of effector memory and effector, according to the expression of surface molecules CD45RO and CD27. The T lymphocytes are cells of long life with capacity of rapid expansion and function, after a new antigenic exposure. In tuberculosis, it was found that specific memory T cells are present, however, gaps remain about the role of such cells in the disease immunology. In this study, the phenotypic profile was analyzed and characterized the functionality of CD4+ T lymphocytes and CD8+ T cells of memory and effector, in response to specific stimuli in vitro, in patients with active pulmonary TB, compared to individuals with latent infection with Mycobacterium tuberculosis the ones treated with pulmonary TB...
December 2017: Immunology Letters
https://www.readbyqxmd.com/read/29105294/regional-differences-in-the-incidence-of-tuberculosis-among-patients-with-newly-diagnosed-diabetes-mellitus
#19
Bo Ram Yang, Young-Ae Kang, Heo Eun Young, Bo Kyung Koo, Nam-Kyong Choi, Seung-Sik Hwang, Chang-Hoon Lee
OBJECTIVE: There are regional differences in the burden of tuberculosis (TB). Although these differences might be explained by regional differences in the risk factors of TB, whether such risk factors are actually associated with the regional differences in the TB burden remains unclear. This study aimed to investigate the relationship between the risk factors of and regional differences in TB incidence. METHODS: A cohort study applying nationwide claims database in Republic of Korea included patients newly diagnosed with type 2 diabetes mellitus (DM) in 2009...
November 4, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29104936/tuberculosis-state-is-associated-with-expression-of-toll-like-receptor-2-in-sputum-macrophages
#20
Karim Lakehal, David Levine, Kathleen F Kerr, Pooja Vir, Natalie Bruiners, Alfred Lardizabal, Maria Laura Gennaro, Richard Pine
During tuberculosis, macrophages are critical for both pathogen survival and host immune activation. Since expression of particular cell surface markers reflects cell function, we used flow cytometry to measure the abundance of surface markers associated with polarity, lipid uptake, or pattern recognition on macrophages found in induced sputum. Nine macrophage surface markers were examined from three groups of donors: infection-free, latent tuberculosis infection, and active pulmonary tuberculosis. Using a trend test, we found that expression of Toll-like receptor 2 was greater from absence of infection to latent infection and from latent infection to active tuberculosis...
November 2017: MSphere
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